How do I get the area of either the fixed region or the scrollable region within the RowScrollRegion?
Are you familar with our UIElements?
You would probably have to get the RowColRegionIntersectionUIElement and get its rectangle and then remove the rectangles for its child RowUIElement types which are pinned.
Utility for looking at UIElements:
http://geekswithblogs.net/devin/archive/2005/11/17/60406.aspx
Background on our Presentation Layer Framework which our UIElements are part of:
http://help.infragistics.com/Help/NetAdvantage/NET/2008.2/CLR2.0/html/Win_Presentation_Layer_Framework_PLF.html
To get a UIElement to work from certain objects like cells and rows will have a GetUIElement method. Of of these UIElements there is a GetContext method in addition to GetAncestor and GetDescendant to navigate the tree.
UIElement members:
http://help.infragistics.com/Help/NetAdvantage/NET/2008.2/CLR2.0/html/Infragistics2.Win.v8.2~Infragistics.Win.UIElement_members.html